Ore to Fuuki Iin no.

Up until two weeks ago, Riku Kurata has lived his entire life as a boy. However, his whole world changes when his father informs him of his plans to remarry. The woman his father intends to marry also has a son, and having two sons in the family will create inheritance issues down the line. To avoid further conflicts, Riku's father lies about having a daughter, and Riku must now shoulder this facade until he completes his compulsory education and leaves his home. Though annoyed by the situation...